i never managed to get to stowe when i lived out there, so i cant speak to how good it is.
ive skied jay which i thought was great, park wasn't the greatest back then, maybe its changed though.
but im with the guy above. if you want good terrain, and a good park, then go to sugarloaf. decent bit more fun terrain to be found than at the other places you listed. i would think stowe would be pretty close though at least in terms of the mountain. it looks like it has a bit more alpine to it? then again EC above treeline skiing is normally very hit or miss, and pretty much a guaranteed no go for xmas.